Flora of Ascension

Euphorbia origanoides, also called Ascension spurge, is a species of plant in the family Euphorbiaceae. It is endemic to Ascension Island, a dependency of the UK overseas territory of Saint Helena. Its natural habitats are introduced vegetation. It is threatened by habitat loss.

Oldenlandia adscensionis was a species of plant in the family Rubiaceae. It was endemic to Ascension Island. It became extinct due to habitat loss; not seen since 1888.

Sporobolus caespitosus, commonly known as Ascension hedgehog grass, is a species of grass in the family Poaceae. It is endemic to Ascension Island, in the South Atlantic Ocean, where it is known only from the weather side of the Green Mountain area, where it occupies an area of less than 0.5 km2. It inhabits the vertical and sloping cinder banks of Green Mountain where very few other species are present, and seems to be adapted to the exposed conditions found at these sites. It is threatened by introduced vegetation and habitat loss.

Sporobolus durus was a species of grass in the family Poaceae, found only on Ascension Island in the South Atlantic. It is extinct due to overgrazing and displacement by invasive weeds. Its date of extinction is unknown; it was last recorded in 1886 but not searched for, specifically, until 1998.

Ptisana purpurascens is a species of fern in the family Marattiaceae that is endemic to Ascension Island. It is considered a critically endangered species.

Pteris adscensionis is a fern species in the subfamily Pteridoideae of the family Pteridaceae. It is endemic to Ascension Island, and there are thought to be fewer than 500 individuals left in the wild. Its natural habitat has been severely reduced due to the large number of species introduced to the island when it was first settled in the 18th century.

Asplenium ascensionis is a species of fern in the family Aspleniaceae that is endemic to Ascension Island. Its natural habitats are receding due to introduced vegetation. It is threatened by habitat loss.

Cyperus appendiculatus is a species of sedge that is endemic to Ascension Island, Trindade and Martim Vaz, and Fernando de Noronha.

Gastoniella is a genus of ferns belonging to the family Pteridaceae. Its native range is Ascension, South America and North America.

Ouratea is a genus of flowering plants in the family Ochnaceae. It includes over 290 species native to the tropical Americas, from Mexico and Cuba to southern Brazil, to Cameroon and Gabon in West-Central Africa, and to Ascension Island in the South Atlantic. Most species are native to the Americas. There are two African species, Ouratea batesii and Ouratea stenophylla, and Ouratea lessonii is endemic to Ascension. Many genera have been brought into synonymy with Ouratea, including Gomphia.

Juncus acutus, the spiny rush, sharp rush or sharp-pointed rush, is a flowering plant in the monocot family Juncaceae. It is native to the Americas, Northern and Southern Africa, Western and Southern Europe and West Asia, and is found in a variety of wet habitats, such as bogs, fens, meadows, and salt marshes, and along the edges of ponds and lakes. The sharp-pointed rush is a perennial plant that grows to a height of about 60 to 100 centimeters (24 to 39 inches). It has slender, cylindrical stems with narrow, pointed leaves and clusters of small, light brown flowers that bloom in the summer.

Pteris cretica, the Cretan brake, ribbon fern, or Cretan brake fern, is a species of evergreen fern in the family Pteridaceae, native to Europe, Asia and Africa.

Ptisana is a genus in the eusporangiate fern family Marattiaceae, comprising species historically treated in the genus Marattia. The establishment of this genus follows the 2008 work by Andrew G. Murdock, which supported recognition of this group on the basis of genetic analysis and morphology. Ptisana can be distinguished from Marattia by the presence of distinct sutures at the point of leaflet attachment, deeply cut synangia, and the absence of labiate sporangial apertures. The name Ptisana is derived from the Latin word for pearl barley, an allusion to the shape of the synangia. Ptisana

Portulaca oleracea (common purslane, also known as little hogweed, or pursley) is a succulent plant in the family Portulacaceae. All parts of the plant are edible raw or cooked.

Enneapogon is a cosmopolitan genus of plants in the grass family. They are also called bottle washers or pappus grass. These perennial grass species are found in tropical and warm temperate areas. They have small, narrow inflorescences. Species Enneapogon asperatus - Queensland Enneapogon avenaceus - bottle-washers - Australia Enneapogon caerulescens - Australia Enneapogon cenchroides - Africa, Madagascar, Arabian Peninsula, Indian subcontinent Enneapogon cylindricus - jointed nineawn - Australia Enneapogon decipiens - Australia Enneapogon desvauxii - nineawn pappusgrass - Africa, temperate

Digitaria ciliaris is a species of grass known by the common names southern crabgrass, tropical finger-grass, tropical crabgrass or summer grass. The grass is known as "ගුරු තණ - guru thana" in Sri Lanka.

Cyperus cyperoides is a species of sedge that is native to parts of Africa, Asia, Australia and Oceania.

Cyperus distans, also known as slender cyperus, is a species of sedge native to tropical and subtropical wetlands in sub-Saharan Africa, Asia (India, Indochina, China, Indonesia, Philippines, etc.), Madagascar, New Guinea, Australia, Latin America (from Mexico to Argentina), the West Indies, the southeastern United States (Florida, Georgia, North Carolina) and various oceanic islands.

Commicarpus is a genus of flowering plants belonging to the family Nyctaginaceae. The genus contain some 30 to 35 species which are native to the tropics and subtropics. Most are found in Africa and western Asia, and eight species are native to southern Africa. Species of the genus are distinguished from one another by details of the anthocarp and the shape and indumentum of the flower's lower coriaceous (or leathery) part. They grow in soil that is rich in calcium, and especially soil with a strong component of heavy metals.

Histiopteris incisa, the bat's wing fern, water fern or fern mata, is a common plant found in Australia, New Zealand and other islands in the south Pacific region. Usually found in moist areas, where it may form large colonies. The lowermost lobes of each pinnae have a bat wing like appearance, giving the fern its common name.

Histiopteris is a genus of ferns in the family Dennstaedtiaceae described as a genus in 1875. The following species are accepted in the genus Histiopteris: Histiopteris alte-alpina Alderw. Histiopteris caudata (Copel.) Holttum Histiopteris conspicua Alderw. Histiopteris estipulata Alderw. Histiopteris hennipmanii Hovenkamp Histiopteris herbacea Copel. Histiopteris incisa (Thunb.) J.Sm. - Common name: batwing fern, is widespread across tropical and subtropical Asia, Australia, Africa, Latin America, and various oceanic islands. Histiopteris pilosa Holttum Histiopteris reniformis Alderw.

Hypolepis (beadfern) is a genus of ferns described as a genus in 1806. The word is derived from Greek, meaning "under scale". It is found in tropical and subtropical regions, primarily in the New World but also in the Old World and on various oceanic islands.

Grammitis (dwarf polypody) is a genus of ferns in the family Polypodiaceae, subfamily Grammitidoideae, according to the Pteridophyte Phylogeny Group classification of 2016 (PPG I). It had formerly been placed in the family Grammitidaceae, but this family is no longer recognized by most authors because phylogenetic analyses of DNA sequences have shown that it is embedded in Polypodiaceae. The delimitation of Grammitis was drastically narrowed in the first decade of the 21st century. It now contains about 25 species. In 2003, a study of the distribution of grammitid ferns placed 11 species in

Oldenlandia is a genus of flowering plants in the family Rubiaceae. It is pantropical in distribution and has about 240 species. The type species for the genus is Oldenlandia corymbosa. Oldenlandia was named by Linnaeus in 1753 in Species Plantarum. The name honors the Danish botanist Henrik Bernard Oldenland (c. 1663 – 1697). Some species are important in ethnomedicine; a number (usually island endemics) are threatened species, with one species and one variety being completely extinct already. Some botanists have not recognized Oldenlandia, but have placed some or all of its species in a

Cyperus brevifolius is a species of sedge known by several common names, including shortleaf spikesedge, green kyllinga, perennial greenhead sedge, and kyllinga weed. It is native to tropical areas in the Americas but it can be found in warm regions around the world where it is an introduced species. This is a rhizomatous perennial herb growing one to several erect stems to heights up to about half a meter, often much shorter. It produces tiny inflorescences of a few spikelets each which in total are less than a centimeter long. Pollens are tiny, approximately 20-30 microns in size. It is

Polypogon is a nearly cosmopolitan genus of plants in the grass family, commonly known beard grass or rabbitsfoot grass.

Aristida adscensionis is a species of grass known by the common name sixweeks threeawn. It is native to the Americas but it is distributed nearly worldwide. It grows easily in disturbed and waste areas and has potential to become a weed.

Cyperus polystachyos, also known as Pycreus polystachyos, and also called manyspike flatsedge in the US, or bunchy sedge, coast flatsedge, many-spiked sedge or Texas sedge in Australia, is a herbaceous species in the family Cyperaceae, widespread in tropical and subtropical areas around the world, sometimes extending its range into temperate regions.

Persicaria lapathifolia (syn. Polygonum lapathifolium), known as pale persicaria, is a plant of the family Polygonaceae. It is considered to be native throughout most of the world, from arctic to tropical realms, except South America and Southern Africa. It is closely related to Persicaria maculosa and as such is considered a weed in Britain and Europe. Other common names for the plant include pale smartweed, curlytop knotweed, and willow weed. It is a species complex made up of a great many varying forms, sometimes considered varieties. The environment also has a strong influence on the

Pteris (brake) is a genus of about 300 species of ferns in the subfamily Pteridoideae of the family Pteridaceae. They are native to tropical and subtropical regions, southward to New Zealand, Australia, and South Africa, north to Japan and North America. 78 species (35 endemic) are found in China. Some species of Pteris have considerable economic and ecological value, such as Pteris multifida, Pteris ensiformis, Pteris vittata can be used for ornamental purposes; as a hyperaccumulator, Pteris multifida and Pteris vittata can be used to control soil pollution. Many of them have linear frond